AHC:Henry Wallace vs Tom Dewey

Say FDR dies or is incapacitated early, the presidential candidates are Henry Wallace and Tom Dewey. Who wins, and how does this affect WW2?
 
If this was 44, Wallace would likely win the South wouldn't have wanted Wallace- but they wouldn't go Republican.
48...likely Dewey. (Ironically, Dewey and some others suggested that, had Wallace not run, the Democrats would have been more vulnerable to criticism.)
 
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